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11. 发明授权

US07813436B1 Frame synchronization method and apparatus 有权
标题翻译：帧同步方法和装置
公开(公告)号：US07813436B1
公开(公告)日：2010-10-12
申请号：US11851115
申请日：2007-09-06
申请人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
发明人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2656 , H04L27/2676
摘要： In a method for synchronizing a receiver to a synchronous signal, a plurality of potential symbols are detected in a signal, the signal having been processed based on automatic gain control (AGC) with a varying gain. Next frame potential symbols corresponding to potential symbols in the plurality of potential symbols are determined, the next frame potential symbols being in frames subsequent to the frames in which the corresponding potential symbols are located. A gain of the AGC is fixed for each corresponding symbol interval during which a next frame potential symbol is operated on by the AGC. In between next frame potential symbols, the AGC is allowed to vary. Next frame potential symbols are analyzed after a transform is calculated to determine if any correspond to a start of a frame.
摘要翻译：在将接收机同步到同步信号的方法中，在信号中检测多个电位符号，该信号已经基于具有变化增益的自动增益控制（AGC）来处理。确定与多个电位符号中的电位符号相对应的下一帧电位符号，下一个电位符号位于相应电位符号位于的帧之后的帧中。对于每个对应的符号间隔，AGC的增益是固定的，在该间隔期间，由AGC操作下一个帧电位符号。在下一帧电势符号之间，允许AGC变化。在计算变换之后分析下一帧电位符号，以确定是否有对应于帧的开始。

12. 发明授权

US08254503B1 Tracking automatic gain control of orthogonal frequency domain multiplexing systems 有权
标题翻译：跟踪正交频域复用系统的自动增益控制
公开(公告)号：US08254503B1
公开(公告)日：2012-08-28
申请号：US13169691
申请日：2011-06-27
申请人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
发明人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
IPC分类号： H04B14/06 , H04L27/28
CPC分类号： H04L27/08 , H03G3/3052 , H03G3/3078 , H04L27/2626
摘要： An automatic gain control tracking system including a variable gain amplifier and an automatic gain control module. The variable gain amplifier is configured to amplify an input signal in accordance with a first gain, in which i) the input signal comprises a plurality of orthogonal frequency domain multiplexing (OFDM) symbols, and ii) each of the plurality of orthogonal frequency domain multiplexing (OFDM) symbols in the input signal is preceded by a respective cyclic prefix. The automatic gain control module configured to vary the first gain of the variable gain amplifier during the respective cyclic prefix preceding each of the plurality of orthogonal frequency domain multiplexing (OFDM) symbols in the input signal.
摘要翻译：一种包括可变增益放大器和自动增益控制模块的自动增益控制跟踪系统。可变增益放大器被配置为根据第一增益放大输入信号，其中i）输入信号包括多个正交频域复用（OFDM）符号，以及ii）多个正交频域复用中的每一个（OFDM）符号之前是相应的循环前缀。所述自动增益控制模块被配置为在所述输入信号中的所述多个正交频域复用（OFDM）符号中的每一个之前的相应循环前缀期间改变所述可变增益放大器的第一增益。

13. 发明授权

US08718166B2 Maximal ratio combining of equalized symbols for MIMO systems with HARQ and/or repetition coding 有权
标题翻译：用于MIMO系统的均衡符号与HARQ和/或重复编码的最大比组合
公开(公告)号：US08718166B2
公开(公告)日：2014-05-06
申请号：US11834599
申请日：2007-08-06
申请人： Jungwon Lee , Woong Jun Jang , Hui-Ling Lou
发明人： Jungwon Lee , Woong Jun Jang , Hui-Ling Lou
IPC分类号： H04B7/02
CPC分类号： H04L27/01 , H04B7/0413 , H04B7/0697 , H04B7/0845 , H04B7/0857 , H04L1/08 , H04L1/1816 , H04L1/1845 , H04L2025/03426
摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors based on the same transmitted vector. The receiver linearizes each received signal vector using one or more zero-forcing, MMSE, or other suitable linear equalizers. The components of the equalized signal vectors may be combined using maximum-ratio combining to form the components of a combined equalized signal vector. The components of the combined equalized signal vector may then be decoded individually using a linear decoder.
摘要翻译：提供了用于对多输入多输出（MIMO）系统中的信号向量进行解码的系统和方法，其中接收机已经基于相同的传输向量接收了一个或多个信号向量。接收机使用一个或多个零强制，MMSE或其他合适的线性均衡器来线性化每个接收信号向量。可以使用最大比合并来组合均衡的信号向量的分量以形成组合的均衡信号向量的分量。然后可以使用线性解码器单独地解码组合的均衡信号向量的分量。

14. 发明授权

US08571148B1 Preamble detection with multiple receive antennas 有权
标题翻译：使用多个接收天线进行前导码检测
公开(公告)号：US08571148B1
公开(公告)日：2013-10-29
申请号：US13568747
申请日：2012-08-07
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04L27/06
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2675
摘要： A system including a control module and a correlation module. The control module receives signals, including subcarriers having frequencies in a frequency band, via a plurality of antennas, and divides the frequency band into sub-bands each including a plurality of the subcarriers. The correlation module generates sets of correlation values by correlating symbols in the sub-bands with a plurality of preamble sequences. A set of correlation values is generated for one of the plurality of antennas and is generated based on the preamble sequences. The control module generates sums by adding selected correlation values from the sets. The selected correlation values in a sum are generated respectively for the plurality of antennas and are generated based on one of the preamble sequences. The control module detects a preamble sequence in the signals by determining whether a largest one of the sums is greater than or equal to a predetermined threshold.
摘要翻译：一种包括控制模块和相关模块的系统。控制模块经由多个天线接收包括具有频带频率的子载波的信号，并将该频带划分成各自包括多个子载波的子带。相关模块通过将子带中的符号与多个前同步码序列相关联来生成相关值集合。为多个天线中的一个天线生成一组相关值，并且基于前导序列生成相关值。控制模块通过从集合中添加所选的相关值来产生和。对于多个天线分别产生和中的选择的相关值，并且基于前导码序列之一生成。控制模块通过确定和中的最大值是否大于或等于预定阈值来检测信号中的前导码序列。

15. 发明授权

US08472906B1 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal 有权
标题翻译：用于从立体声复用信号中恢复副载波信号的系统和方法
公开(公告)号：US08472906B1
公开(公告)日：2013-06-25
申请号：US13599621
申请日：2012-08-30
申请人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
发明人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
IPC分类号： H04B7/00
CPC分类号： H04B1/1653 , H04H40/45
摘要： Disclosed herein are systems and methods for recovering a sub-carrier signal from a multiplexed signal having an embedded pilot tone signal. The recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for generating a frequency-doubled signal from the recovered pilot signal, and for phase-shifting the frequency-doubled signal by a pre-determined phase difference from the embedded pilot tone signal. Another recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for phase-shifting the pilot signal by a pre-determined phase difference from the embedded pilot tone signal, and for generating a frequency-doubled signal from the phase-shifted signal.
摘要翻译：这里公开了用于从具有嵌入导频音信号的复用信号中恢复副载波信号的系统和方法。恢复系统包括用于从所接收的多路复用信号中恢复导频信号的电路，用于从恢复的导频信号产生加倍频的信号，并且将加倍频信号与嵌入式导频相移预定的相位差音调信号。另一个恢复系统包括用于从接收到的多路复用信号中恢复导频信号的电路，用于将导频信号与嵌入的导频音信号相位相移预定的相位差，并用于从相移信号。

16. 发明授权

US08451931B1 Method and apparatus for implementing transmit diversity in OFDM systems 有权
公开(公告)号：US08451931B1
公开(公告)日：2013-05-28
申请号：US13403949
申请日：2012-02-23
申请人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit Nabar , Yakun Sun
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit Nabar , Yakun Sun
IPC分类号： H04B7/00
CPC分类号： H04L27/2627 , H04B7/0413 , H04B7/0669 , H04B7/0671 , H04L1/0625 , H04L5/0023 , H04L5/0087 , H04L25/0204 , H04L25/03159 , H04L2025/03414 , H04L2025/03426
摘要： A plurality of diagonal matrices Ci is determined, where the plurality of diagonal matrices Ci is for modifying a plurality of transmit signals to be transmitted via a plurality of transmit antennas, each diagonal matrix Ci for modifying an i-th block of sub-carriers, adjacent in frequency, in the plurality of transmit signals. The plurality of diagonal matrices Ci is used to modify the plurality of transmit signals to implement transmit diversity.

17. 发明授权

US08442166B2 Preamble detection with unknown channel 有权
标题翻译：前导码检测与未知信道
公开(公告)号：US08442166B2
公开(公告)日：2013-05-14
申请号：US13460109
申请日：2012-04-30
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H03D1/00
CPC分类号： H04L27/2656 , H04L5/023 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A system including a control module and a correlation module. The control module partitions a total number of subcarriers, in a received signal, into a predetermined number of bands. The correlation module generates a plurality of correlation values for a plurality of preamble sequences. A correlation value for a preamble sequence is generated by correlating symbols in each band with corresponding symbols in the preamble sequence to generate correlations for each band, adding the correlations generated for a respective band to generate a sum for each band, and adding the sums generated for all the bands. The control module select a largest correlation value from the plurality of correlation values and determine that one of the preamble sequences is detected in the received signal in response to the largest correlation value being greater than or equal to a predetermined threshold.
摘要翻译：一种包括控制模块和相关模块的系统。控制模块将接收到的信号中的副载波的总数分成预定数量的频带。相关模块为多个前同步码序列生成多个相关值。通过将每个频带中的符号与前导码序列中的相应符号相关联来产生前导码序列的相关值，以产生每个频带的相关性，将针对各个频带生成的相关相加，以产生每个频带的和，并将所产生的和相加对于所有的乐队。所述控制模块根据所述多个相关值选择最大相关值，并且响应于所述最大相关值大于或等于预定阈值，确定在所述接收信号中检测到所述前导码序列之一。

18. 发明授权

US08345795B1 System and method of beamforming with reduced feedback 有权
标题翻译：具有减少反馈的波束成形的系统和方法
公开(公告)号：US08345795B1
公开(公告)日：2013-01-01
申请号：US13407435
申请日：2012-02-28
申请人： Jungwon Lee , Rohit Nabar , Hui-Ling Lou
发明人： Jungwon Lee , Rohit Nabar , Hui-Ling Lou
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04B7/0408 , H04B1/00 , H04B7/0417 , H04B7/0465 , H04B7/0473 , H04B7/0663 , H04L5/0023 , H04L25/0204 , H04L2025/03414 , H04L2025/03426
摘要： A system and method of beamforming may reduce feedback requirements. In some implementations, a beamforming technique may employ a diagonal matrix as a beamforming matrix along with a stream-to-transmit antenna mapping matrix. In some antenna phase beamforming strategies, a diagonal beamforming matrix in which the diagonal elements have a constant magnitude may be employed. Accordingly, a beamforming system may be utilized with few feedback information bits being transmitted from the beamformee; such a system may also minimize or eliminate power fluctuations among multiple transmit antennae.
摘要翻译：波束成形的系统和方法可以减少反馈要求。在一些实现中，波束形成技术可以采用对角矩阵作为波束形成矩阵以及流到发射天线映射矩阵。在一些天线相位波束形成策略中，可以采用其中对角元素具有恒定幅度的对角波束形成矩阵。因此，可以利用波束形成系统，而从波束形成器发送的反馈信息比特数很少; 这样的系统还可以最小化或消除多个发射天线之间的功率波动。

19. 发明授权

US08229017B1 Transmit beamforming utilizing channel estimation matrix decomposition feedback in a wireless MIMO communication system 有权
标题翻译：使用无线MIMO通信系统中的信道估计矩阵分解反馈来发射波束成形
公开(公告)号：US08229017B1
公开(公告)日：2012-07-24
申请号：US12330268
申请日：2008-12-08
申请人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
发明人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
IPC分类号： H04B7/02
CPC分类号： H04B7/0665
摘要： A method and apparatus for a communication system having a first transceiver device having a first plurality of antennas and a second transceiver device having a second plurality of antennas determines a channel estimation matrix describing a forward channel in which a signal travels from the first transceiver device to the second transceiver device. The channel estimation matrix is decomposed to derive a unitary matrix and an upper triangular matrix. A precoding matrix is developed using the upper triangular matrix, and the precoding matrix is used to control transmission of a modulated signal.
摘要翻译：一种具有具有第一多个天线的第一收发器装置和具有第二多个天线的第二收发器装置的通信系统的方法和装置确定了描述信号从第一收发器装置行进到前向信道的信道估计矩阵，第二收发器装置。信道估计矩阵被分解以导出酉矩阵和上三角矩阵。使用上三角矩阵开发预编码矩阵，并且预编码矩阵用于控制调制信号的传输。

20. 发明授权

US08005169B1 Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems 有权
标题翻译：正交频分复用系统的信道和前导序列的联合估计
公开(公告)号：US08005169B1
公开(公告)日：2011-08-23
申请号：US11725039
申请日：2007-03-16
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04L27/06
CPC分类号： H04L25/022 , H04L25/0224 , H04L27/261
摘要： A system includes an estimation module, a processing module, and a control module. The estimation module receives a signal having N sub-carriers and generates N first estimates for channel gains of the N sub-carriers, where N is an integer greater than 1. The processing module generates N second estimates based on the N first estimates. The control module generates N differences between each of the N first estimates and corresponding ones of the N second estimates and estimates (i) a channel gain of the signal and (ii) a preamble sequence in the signal based on the N differences.
摘要翻译：系统包括估计模块，处理模块和控制模块。估计模块接收具有N个子载波的信号，并产生N个子载波的信道增益的N个第一估计，其中N是大于1的整数。处理模块基于N个第一估计生成N个第二估计。控制模块在N个第一估计和N个第二估计中的相应估计之间产生N个差异，并且基于N个差异估计（i）信号的信道增益和（ii）信号中的前导序列。

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